JPH07100353B2 - Method for manufacturing FRP antenna material - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an FRP antenna material.

2. Description of the Related Art Conventional metal antennas have the drawback of breaking due to metal fatigue due to wind pressure, vibration, and the like. The present invention is intended to manufacture an antenna that is hard to break by using an FRP material.

Further, in the case of FRP, there is a case where a metal wire must be exposed in order to electrically connect the ends.

At this time, in the case of a conventional rod-shaped body containing a metal wire (for example, a FRP layer is formed on the outside of the metal wire), the metal wire is scratched or scratched during the cutting operation at the exposed position. If the cut is not enough due to fear of being scratched, the FRP will not be cut and it will be difficult to pull out, or if it is forcibly pulled out, the metal wire will be cut.

The present invention has solved such drawbacks as the FRP.
The present invention relates to a method for manufacturing an antenna material.

[0005]

The gist of the present invention will be described with reference to the accompanying drawings.

A group of fibers 2 impregnated with a thermosetting resin 1 is arranged on the outer peripheral surface of a synthetic resin coating 5 having a plurality of metal wires 3 bundled therein and a synthetic resin protective layer 6 formed on the outer side, and outside of this. A rod-shaped body having fibers 2 arranged therein is passed through a heated die 4, and the thermosetting resin 1 is cured to obtain a fiber-reinforced resin rod-shaped body A having a fiber-reinforced resin layer a formed on the outer periphery.
The fiber-reinforced resin layer a at both ends of the fiber-reinforced resin rod A
Also, the present invention relates to a method for manufacturing an FRP antenna material, characterized in that the synthetic resin protective layer 6 is removed to expose the metal wire 3 to manufacture the antenna material.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view of a manufacturing process. Reference numerals 7 and 7'indicate a bobbin, 8 an impregnation vat, 9 a heating section, 10 a puller, and 11 a cutter.

The second fiber group uses glass fibers. A vinyl ester resin is suitable as the thermosetting resin. The die temperature is preferably about 110 ° C to 125 ° C. Heating part 9
Maintains about 135 ° C. The drawing speed of the drawing line is about 0.9 m / min.

As the metal wire 3, 0.16φ mm × 17 copper stranded wires are used, and a synthetic resin protective layer 6 is formed on the outside of the copper stranded wire. The synthetic resin protective layer 6 is made of vinyl chloride, polyethylene, synthetic rubber or the like having heat resistance and elasticity. As a product, for example, φ as shown in Figs.
3.5 mm, length 340 mm, metal wire 3 protrusion length 15
Mass production of mm antenna material.

For both end treatments, first, the fiber reinforced resin layer a is cut to the synthetic resin protective layer 6 using a grinder or the like in the order shown in FIG. 4, and then the synthetic resin protective layer 6 is cut with a cutter knife or the like. Make a notch on the outer circumference, sandwich one side of the notch with your hand, and cut the synthetic resin protective layer 6 by the tearing force by pulling the other side horizontally, and at the same time pull out the metal wire 3 as shown in FIG. To expose. The exposed metal wire 3 is soldered, for example, and appropriately connected.

[0011]

As described above, according to the present invention, the fiber-reinforced resin rod-shaped body containing a metal wire is continuously mass-produced, and when this is used for an antenna, the following features are exhibited.

A durable antenna that can withstand wind pressure and does not break.

An antenna with excellent corrosion resistance.

It becomes a soft and peculiar antenna.

The antenna performance is comparable to conventional products.

Since the metal wire is covered with the synthetic resin protective layer, the metal wire is prevented from being attacked by the thermosetting resin being manufactured, and the metal wire is made of synthetic resin when exposed. Since the cutting with the cutter is stopped to the protective layer and the metal wire is pulled horizontally, the metal wire can be easily exposed without damaging the metal wire.

As described above, the manufacturing method of the FRP antenna material is excellent.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a manufacturing process of a fiber-reinforced resin rod-shaped body A of the present embodiment.

FIG. 2 is a front view of a fiber-reinforced resin rod-shaped body A of this example.

FIG. 3 is a cross-sectional view of a rod-shaped body A of a fiber-reinforced example of the present example.

FIG. 4 is an exploded explanatory view of a cutting method for exposing a metal wire to an end portion of the fiber-reinforced resin rod-shaped body A of the present embodiment.

[Explanation of symbols]

 A fiber-reinforced resin rod-shaped body a fiber-reinforced resin layer 1 thermosetting resin 2 fiber 3 metal wire 4 die 5 resin coating 6 synthetic resin protective layer

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location // B29K 101: 10 105: 08 105: 22 B29L 9:00 31:34 (72) Inventor Kazuhiko Tamura Saitama 1406 Hasunuma, Omiya City Yagi Antenna Co., Ltd. Omiya Factory (56) Reference JP-A-63-35332 (JP, A) JP-A-52-59676 (JP, A) JP-A-48-80174 (JP, A) Actual Development Sho 58-50924 (JP, U)

Claims (1)

[Claims] 1. A group of fibers 2 impregnated with a thermosetting resin 1 is arranged on the outer peripheral surface of a synthetic resin coating 5 having a plurality of metal wires 3 bundled therein and a synthetic resin protective layer 6 formed on the outside thereof. Heated die 4 with rod-shaped body having fibers 2 arranged outside
A fiber-reinforced resin rod-shaped body A having a fiber-reinforced resin layer a formed on the outer periphery by passing through the inside and curing the thermosetting resin 1 is obtained, and the fiber-reinforced resin layer a at both ends of the fiber-reinforced resin rod-shaped body A and A method of manufacturing an FRP antenna material, comprising removing the synthetic resin protective layer 6 and exposing the metal wire 3 to manufacture the antenna material.